I've had a Saniflo Sanishower tor over three years to pump waste from a garage sink to the main foul water pipe about 120cm above it. It has worked perfectly. during that time.
It is in a double-cupboard under the sink, which I guess was the previous owner's kitchen reject when a new kitchen was installed years ago. This morning I noticed a smell in the cupboard - that slightly sewer-like smell of standing wastewater. I checked the pump inlet and outlet, and the area around the pump, but there was no water to be seen. It was then I noticed that a cap on top of the pump body (probably covering an air-bleed to the pressure switch) was missing. That cap is white plastic, about 4 cm in diameter, and a cm or so deep in the centre where it fits into a hole on the top of the pump. I've taken everything out of that cupboard and looked around it, but that bloody cap is nowhere to be seen! There is no way it could have broken and fallen into the pump body. So where is it? In a parallel universe?
Anyway, I contacted Saniflo and a new cap is on its way. Their support was excellent.